AO Gold Member
Join Date: Jun 2007
Location: United Kingdom
If you can get hold of a 3.0, go for it; it's definitely worth it!
You'll need to use your CF2 loom if you get a CF3 3.0, plus keep your 2.5 ECU, engine mounts, MAF, clutch, flywheel and gearbox.
If your clutch is near renewal time, fit a GTA clutch as they are much stronger and only a few quid more. If you can afford it, get a Q2 diff, as you will find traction hard in 1st - 3rd without when you decide to boot it!
Note that on the 3.0 from the 166, you also need to change the upper mount for the engine stabiliser which will involve removing the cambelts and pulleys (good time to fit new ones anyway whilst the engine is out).
You don't need to do this on the 3.0 from the GTV however.